Kozlovskaya Veronika, Zavgorodnya Oleksandra, Wang Yun, Ankner John F, Kharlampieva Eugenia
Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama, 35294, United States.
Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
ACS Macro Lett. 2013 Mar 19;2(3):226-229. doi: 10.1021/mz300661f. Epub 2013 Feb 26.
We have tailored the internal architecture of ultrathin poly(methacrylic acid) (PMAA) hydrogels from well stratified to highly intermixed by controlling the internal structure in layer-by-layer templates used for hydrogel fabrication. We have found pH-triggered swelling properties of these hydrogels to be significantly affected by hydrogel architecture. Well-stratified hydrogels exhibited a dramatic 10-fold increase in thickness when transitioned between pH = 5 and 7.5, unlike the 2-fold swelling observed in less-organized hydrogels.
我们通过控制用于水凝胶制备的逐层模板的内部结构，将超薄聚（甲基丙烯酸）（PMAA）水凝胶的内部结构从高度分层调整为高度混合。我们发现这些水凝胶的pH触发溶胀特性受水凝胶结构的显著影响。与在结构较松散的水凝胶中观察到的2倍溶胀不同，高度分层的水凝胶在pH值从5转变为7.5时厚度急剧增加了10倍。
